Pull-switch indicator.



G. W. GOODRIDGE. PULL SWITCH INDICATOR. APPLICATION FILED APR.9,,19l4.

Patented Dec. 4, 1917.

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5 mm ntoz Fairfield and State of earn ric w. eoonnrnen, or nnrnenroar,

to concerts, ornnrnearonr, connnc'rrcur, A conronnrron or con-CONNEGTICUT, ASSIGNOR TO THE BRYANT PULL-S'WITCH INDICATOR.

Specification of Letters Patent.

- Patented Dec. 4, 1917.

ldpplication filed Apri19, 1914, Serial No. 830,819.

To all whom may concern:

it known that T, GILBERT W. Goonnincn, a citizen of the United States ofAmerica, and residing at Bridgeport, in the county of Connecticut, haveinvented a certain new and useful Improvement in Pull-btwitchindicators, of which following is a specification.

My invention relates to switch indicators and particularly to indicatorsfor pull switches, the object of my invention being to provide a simpleand inexpensive device for this purpose particularly adapted for usewith switch mechanisms of the type hereinafter described.

in the accompanying drawings,

Figure 1 is a vertical'section through an electric lamp socket of thepull type in which an indicator embodying my invention is embodied;

through anism in two diderent positions; and

Fig. i is a perspective of a modified detail.

in certain pull switches, the perating mechanism is of such characterthat the pull member, ordinarily a flexible pull chain of the ball andlink type, takes different positions 1'. e. is drawn farther in or leftfarther out in the on and off positions of the switch. An example ofsuch mechanism is illustrated in the patent to Poet 1,089,785, December1, 1913 and the construction there shown is employed to illustrate thepresent invention This pull socket comprises the usual cap and shell 11forming a casino with insulating lining 1:2 to inclose the switchmechanism arranged between the insulating buttons l3 and 1a and thesocket shell 15 mounted on the latter. The switch mechanism is describedin detail in the patent above referred 2 and 3 are horizontal sectionsto, and it suffices for the explanation of the i switchpiece and theother end of which is =fast to a yoke 19 pivoted on the switch spindieso. The pull member or chain. 21 en the outer end of the yoke 19 and outthrough the hell 2% beyond 1whiplh the socket showing the switchmeclrofi position of the switch the yoke 19 is carried by the jointaction of the switch spring 18 and the return spring 23, to the tensionof which the yoke is also subjected, to the position shown in Fig. 2,via, to the point at which it is halted by the impingement thereof, orof the end ball of the chain, against a stop such as the standard Qlwhich spaces the buttons 13 and 14: apart. In the on position of theswitch however, the yoke 19 is halted about midway of its arc of travelby the stop shoulder 25 engaged by the trigger 26 carried by the yoke 19as explained by the above mentioned patent. It is thus apparent that inthe on position of the switch the pull chain hangs farther out of thesocket than in the OE position of the switc This in or out position ofthe chain afiords ready means for indicating the position of the switch.Thus an enlarged ball 27 may be mounted in or on the chain, preferablyat the bell mouth, so that when the switch is off this ball 27 is drawnup into the bell, whereas when the switch'is on it hangs clear below it,as'indicated in dotted lines Fig. 1. The operator can tell at once bythe position of the ball in what position the switch lies.

If a more explicit indication is desired, the ball may be replaced by anindicator such as that illustrated in Fig. 4. This comprises a blankstruck to shape and having flat faces 28 and 29 adapted to receive thewords on and 0d. Lugs 30 may be extended from one face to rest upon thebell mouth and hold the indicator in proper position, while the metalbetweenthe lugs may be turned in to form a spring socket 31 throughwhich one of the chain balls may be snapped to'fasten the device on thechain. As the chain is drawn in, the indicator is pulled up into thebell mouth and displays face '29 hearing the word off. When the chainhangs out in the on position of the switch, the face 28 hearing thelegend on is displayed.

Various other devices will readily suggest ,thcmselves and I do notlimit my invention tothe' details described.

ll claim as my invention i 1. In a pull switch, a flexible pull memberhaving in and out positions respectively in the on-a nd ofi positionsofthe switch, and an indicator on said pull .-member servtar-3 ing byits diiferent positions to indicate the position of the switch.

2. In a pull switch, a bell mouth chain guide, a flexible pull memberpassing through said bell mouth and having in and out positionsrespectively in the on and oil positions of the switch, in combinationwith a self-contained indicator carried by the chain at the bell mouthand serving by its in or out position to show the on or oil position ofthe switch.

3. A pull switch having a bell mouth chain guide, a pull chain passingtherethrough and an indicator on the chain bearing against the saidguide and moving over the same into different positions in the on or offcondition of the switch, whereby said condition is indicatedsubstantially as described.

at. In a pull switch, a flexible pull member having in and out positionsrespectively in the on and ofl positions of the switch, and an indicatormember of greater diameter than the pull member and mounted on thelatter, said indicator serving by its different positions to show theposition of the switch.

5. In a pull switch, a flexible pull member having in and out positionsrespectively in the on and elf positions of the switch, and an indicatormounted on the pull memher, and having different angular positions inthe respective positions of the latter, and

having means for indicating in said clifl'erent positions the conditionof the switch.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses.

' GILBERT IV. GOODRIDGE. Witnesses:

H. M. Wren-mm, H. W. BADEAU.

topics of this patent may be obtained for five cents each, by addressingthe Gommlssioner of Patents,

Washington, D. 0..

